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Discussion Starter #1
Both my cts 3.6 DI did it, just curious. one was louder than the other it seems. and this one ticks then goes away then louder then goes away
 

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2011 CTS4 Coupe, 2014 ELR, 2018 XT5 AWD
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568 Posts
I think what you are hearing is the high pressure fuel system. Because it's a direct injection engine the fuel pressure in that part of the system is 1500-4500 PSI.
 

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2009 CTS 3.6L DI rebuilt to FE3 J55 G80 3.42:1
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1,153 Posts
Which is a good thing.
The argument could be made that, in the context of the timing chain error range, it is allowing wear to near-catastrophic levels. The CEL light definitely does not indicate timing chain wear when it is bad enough to degrade driveability, performance and fuel economy. I think it was clear this was just a warranty claim dodge and not made with the consumer's best interests in mind.
 
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